11. A bug is crawling along the graph of the parabola f(x) = x2. When it passes through the point (1,1), its x-coordinate changes at a rate of 2 in/s. At what rate does its distance to the origin change
at this point??

answer is b  

20

hope you get this one right.

amount of apples bought =$ 2.6

amount of peaches bought =$ 1.475

amount given by you to cashier= $ 20

amount received by me= amount given by you to cashier -   [amount of apples bought +amount of peaches bought]

                                        = 20   - [1.475 + 2.6]

                                        = 20 -   [ 4.075]

                                        =   $15.925

so, change received by me = $15.925